How do you make the price double based on a product option?

I have a printing store tha offers 2-4 business day turnaround and next business day turnaround. When a customer chooses next buisness day turnaround I need the Price to double.

Is their any way of doing this?

Thanks in Advance!

Not a way of auto doing it unless you go over to cubecartforums.org and ask for a mod.